PHP Unconference Europe 2015

Memcache::delete

(PECL memcache >= 0.2.0)

Memcache::deleteDelete item from the server

Description

bool Memcache::delete ( string $key [, int $timeout = 0 ] )

Memcache::delete() deletes an item with the key.

Parameters

key

The key associated with the item to delete.

timeout

This deprecated parameter is not supported, and defaults to 0 seconds. Do not use this parameter.

Changelog

Version Description
Unknown It's not recommended to use the timeout parameter. The behavior differs between memcached versions, but setting to 0 is safe. Other values for this deprecated feature may cause the memcache delete to fail.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example #1 Memcache::delete() example

<?php

/* procedural API */
$memcache_obj memcache_connect('memcache_host'11211);

/* item will be deleted by the server */
memcache_delete($memcache_obj'key_to_delete');

/* OO API */
$memcache_obj = new Memcache;
$memcache_obj->connect('memcache_host'11211);

$memcache_obj->delete('key_to_delete');

?>

See Also

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User Contributed Notes 5 notes

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2
nibblebot at gmail dot com
4 years ago
the Memcache::delete(key) function is broken on several combinations of memcached+pecl-memcache combinations.

pecl-memcache 2.2.5 + memcached 1.4.2 - Memcache::delete(key) WORKS

pecl-memcache 2.2.5 + memcached 1.4.3 - Memcache::delete(key) DOES NOT WORK

pecl-memcache 2.2.5 + memcached 1.4.4 - Memcache::delete(key) WORKS

pecl-memcache 2.2.5 + memcached 1.4.5 - Memcache::delete(key) WORKS

pecl-memcache 3.0.4 + memcached 1.4.2 - Memcache::delete(key) WORKS

pecl-memcache 3.0.4 + memcached 1.4.3 - Memcache::delete(key) DOES NOT WORK

pecl-memcache 3.0.4 + memcached 1.4.4 - Memcache::delete(key) DOES NOT WORK

pecl-memcache 3.0.4 + memcached 1.4.5 - Memcache::delete(key) DOES NOT WORK
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1
vbaspcppguy at gmail dot com
4 years ago
According to the documents, $timeout is not required, but for me if I did not include it regardless of value, it fired an error. I made a simple fix for it.

<?php
class memcache_tools extends memcache
{
    public function
delete($key, $expire=0)
    {
       
parent::delete($key, $expire);   
    }
}
?>

This will force it to behave as it should regardless of version.
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0
padys
1 year ago
In my case this code does NOT work:
<?php
$memcache
->set('index', 'deleted', 0, -1);
?>
because of expire == -1.

I set expire = 1 (and I prefer "replace"):
<?php
$memcache
->replace('index', '', 0, 1);
?>
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0
me at adamhahn dot com
2 years ago
I could not get the delete to work properly, so I ended up trying the 'set' method and setting the timeout value to -1.

<?php
$memcache
->set('index', 'deleted', 0, -1);
?>

It solved my problem with the delete method.

(using memcached 1.4.5 and pecl-memcache 3.0.6)
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-1
Anonymous
4 years ago
Regardless of whether or not it succeeds, for me on Ubuntu 10.04 it always returns false.  Just an FYI, you can't seem to rely on the result.
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